Hi support,
I just purchased Gravity Forms for use on my site specifically for the Mailchimp integration as I have yet to find a better interface for forms. My site is built on one of the themes from Rockettheme.com.
If I deactivate all the plugins developed by Rockettheme I can connect to Mailchimp and set up a feed. However, these plugins are needed within the theme so I am at a loss unless I can resolve this issue. Their Gantry plugin is not the culprit. Specifically it is RokAjaxSearch, RokBox, RokNewsPager & RokTabs. While they have other plugins these are not used in this theme so I cannot comment on their compatibility.
FYI I have all the latest plugins from Rockettheme and Gravity.
Many thanks,
Stephen